Can the Access Provider outright terminate an Access Agreement prior to the MCMC’ approval after notifying MCMC of the intention to terminate the agreement with the Access Seeker?

No,  section 5.17.6 of the MSA stipulates that the Access Provider  shall not terminate or suspend  or seek to materially vary the Access Agreement or access to any network facilities or network services provided under it until such time and on such conditions as the Commission may specify